Many of Ontario County's GIS Data layers are now available for web "mashup" and/or download. Please visit {http://www.co.ontario.ny.us/FormCenter/Geographic-Information-Services-16/Ontario-County-GIS-Data-Resource-Center-101} to access the GIS Data Resource Center. For more information you can reach out to the GIS Coordinator at (585) 396-4482 and we will be happy to assist you.

With the exception of questions related to the County website and OnCor, Information Services support is not available to County residents. The I.S. department provides hardware and software support only to other County departments. The department is also available to provide guidance to local municipalities with their IT needs.

You know the scenario... you browse an online map service for directions or follow your car’s GPS and notice an error or issue with a road segment. Now what? Luckily most of the major map providers have mechanisms to help users report errors. Listed in the document linked below are some direct websites for this purpose. How to Correct GPS and Website Address Data